Tool holder



Feb. 14, 1928.

F. GIAMPETER TOOL HOLDER Filed March 21, 1925 k 95 K @M ZMU;

Patented res. 14, 1928.

FELIX GIAM'PETER, OF CLEVELAND, OHIO.

moon HOLDER.

Application filed March 21,1925. Serial No.;17,f143.

This invention relates to improvements in tool holders having for anobject to provide n'ieans whereby a tool to be sharpened may beadjusted'to various angles and positions with respect to a grindingelement and reliably held at such angle or point.

ly and with a minimum number of operations. 1 b

Other objects will be in part obvious and in part pointed outhereinafter.

In order that the invention and its mode of operation maybe readilyunderstood by persons skilled in the art, Ihave in the ac companyingillustrative drawings, and in the following detailed description basedthereon set out one possible embodiment of the same.

Figure 1 is a front elevation showing the relative positioning of thecompletely assembled elements;

Figure 2 is an end elevation thereof, the arrows indicating the possiblemovement of the several elements;

Figure 3 is a sectional view taken substantially on the line 3-3 ofFigurejQg Figure 1 is a plan view of the tool holder per se; and

Figure 5 is an end view of the movable clamping jaw of the tool holder.

Similar characters of reference designate similar parts throughout thefollowing spe i-' fication and accompanying drawings,

This tool holder is readily attachable to a work table or other form ofsupport and consists of a rest 6 mounting at each end a dependingbracket 7 in which is formed an arcuate slot or way 8. As indicatedclearly in Figure 2 this rest 6 has a longitudinal under-cut groove 9whose function will be hereinafter apparent. Each of these brackets 7 isconnected to one end of the work table or the like 10 by means of asubstantially L-shaped link or arm 11 one end of which is connected tothebracket 7 by means of a bolt 12 which passes through the arcuate slot8 in the bracket and is retainable at any point therein by means of aset screw or look nut 18, this arrangement being shown in Figures land2. Intermediate the ends of the portion attached to the bracket 7 is abolt 14 serving as a connecting medium between the arm or link 11 andthe work table 10. A locking member 15 is arranged as shown in Figures 1and 2 and may be tightened by means of a bar 16 when the parts have beensatisfactorily positioned. The other or elbow portion 17 of the arm 11is curved and provided with an arcuate slot 18 whose configurationconforms to that of the elbow portion 17. This curved elbow portion 17is connected to the ends of the work table by means of a bolt 19 and setscrew or the like device 20, it being understood' that the bolt extendsthrough the arcuate slot. 1 p

With a structure as specified it is obvious that loosening of the locknut 13 at each end of the rest 6 will permitboth lateral and verticaladjustment of the rest 6 with respect to the work table or other support10 and the link 11. Further adjustment may be ob taincd throughloosening and shifting the arm 11 so that the bolt 19 will change itsposition in the elbow portion 17 I A tool holder. or clamp is associatedwith this rest 6 and includes a substantially U shaped frame 21 carryingan undercut tongue or rib 22 which as shown in Figurefl snugly fits intothe under cutgroove or channel 9 in the rest 6. The parallel arms 23 ofthis U-shaped frame 21 have their lower corners cut away for receptionof e transverse ribs 2 1 formed at opposite ends of a slide block or jaw25. This slide block or jaw 25 is provided at opposite ends with pairsof upstanding spaced guide members or posts 26. A vertically movable jawor clamp member 27 is arranged between the pairs of guide posts 26 andincludes apertured ears 28 adapted for vertical move ment between theposts at each end. It is between the jaws 25 and 27 that a tool '1 isclamped during the period it is being sharpened or ground. y

In order to adjustably mount the movable jaw 27 upon the slide block orjaw 251 form a pair of threaded openings 29 which open into the spacebetween the ears 26, and

thread therein bolts 30 which extend through the aforementionedapertured ears of the clamp member 27. These bolts 30 are threaded intothe openings 29 and extend a considerable degree above the guide jaws 26whereby to allow a reasonable margin of adjustment. Obviously, difierentmeans may be employed to lock or fasten the bolts 30 in the block 25 sothere will be no relative. movement between the two. A coil spring 31surrounds each bolt 30 between the ears 28 and the block 25 so that whenthe wing nuts 82 are backed up on the bolts 30 the jaws will be movedapart to permit removal of a tool or the like. It will be noted that thecoilsprings 31 are seated in sockets 33 formed in enlarged portionsbetween the guide jaws 2G, and that these enlarged portions 34 togetherwith the enlarged central portion 35 of the movable clamp 27 permitclamping of small tools as well as large ones. These enlargementscompensate for the space required by the coil springs when they arecompressed to a maxinuun degree.

The slide block 25 together with the attached parts are movable in theblock frame 21 by means of an adjusting screw or bolt 36 whose inner endis threaded into a socket formed in the block 25 while its outer end isfixed against longitudinal movement in the block frame 21 as shown. Aknurled finger piece 37 is fixedto the outer end of the adjusting screw36 for obvious reasons.

The outer ends of some tools are somewhat larger than the portionengaging the grinding element, and in order to accommodate such largeportions I have cut away the upper edge of the side bar 38 of the blockframe 21 as clearly shown in Figures 1 and 4c. \Vith a structure aspointed out it is obvious that many types of tools may he clamped in aholder of this structure and through the several individual meansemployed for angling the parts, the relation of the tool and grindingwheel or other element may be accurately controlled.

Certain changes in the minor details of construction may be resorted toand such of these changes as fall within the scope of the appendedclaims I consider within the spirit of my invention.

I claim:

1. A clamp of the character described comprising, a frame, a jaw movablein the frame, upstanding guide posts carried by the jaw, a movable jaw,gears carried by the movable jaw and slidably arranged between saidguide posts, means for moving the last named jaw toward the first j aw,and a spring device for separating the jaws at times.

2. An apparatus of the character described comprising an elongated resthaving an undercut groove, a U-shaped frame slid able lengthwise on therest and having a rib fitting in the groove,; the opposite branches ofthe trame having undercut shoulders, and a tool holding clamp arrangedbetween the branches of the frame and having projecting shouldersretained by said shoulders, said tool holder being slidable transverselyof the rest in said frame.

In testimony whereof, I afiix my signature.

FELIX GIAMPEIER.

